Well, I'm not a developer but still manage to do the job. You can do it just by read the manual and check the code (by Right click >> View sources)

I don't know what template you are using so I just give advice: The joomla is running on mootools. Your template may call its own jquery system and then joomshopping call its jquery once again. Also you have modal.js - another lightbox effect of joomla's built-in core.

1. jquery of joomshopping is located in /components/com_jshopping/lib/factory.php. Search using keyword "jQuery".
2. For Artisee template - you must do it yourself.

In my case, I just deleted all jquery in joomshopping and use SIGE and moo star rating witch is mootools based.

thanks a lot Mogsama,
it is too much for me...I tried to make changes but joomshopping crash and the site begin a phantom :)
I know I can't ask more. I hope Joomshopping developers make a simple fix.
We say: better a glass half full...